Dianthus Production Tips

Dianthus Production Tips

Modern breeding has made dianthus hybrids easier to produce, offering multiple production methods to suit any business with a wide array of flower colors and forms. Cultivars from Whetman Pinks Ltd., whose breeding program focuses on fragrance and performance, have captured a lot of attention in the market. The finished pot size options range from a quart to 2-gallon.

General Culture
Transplant liners into a well-draining perennial or nursery mix. For smaller sizes like 128s, a pinch is necessary about three weeks after transplant to maximize branching. While bulking and finishing, apply a well-balanced fertilizer targeting 150 ppm nitrogen constant liquid feed. Maintain pH of 6.0 to 6.5, and EC should not exceed 3 mS/cm. Bulk at 60° to 65°F night and day temperatures. Plant growth regulators are not required. Foliage does not need to completely cover the top of the pot prior to vernalization. Common pests and diseases include aphids, spider mites, fusarium and bacterial problems. Keep plants well-spaced and grow moderately moist, never wet.

Crop Timing
There are different production methods that can be used for dianthus.

  1. The most popular method is to transplant liners into the final sales container in the fall and bulk prior to vernalization. Regardless of vernalization requirements, this will produce the best crop with the most uniform and fullest flower canopy. Plants can be overwintered outside in warmer zones, but covering with a frost blanket is recommended to avoid leaf burn from cold winter wind. Growing in a cold greenhouse or minimally heated hoop structure is also recommended if outdoor winter and spring conditions are very wet or if there is a lot of freeze and thaw. The best results are from plants held in a cold greenhouse, with the low temperature set at 35ºF. When outdoor temperatures exceed 38ºF, vent the greenhouse to keep it as cold as possible. Allow plants to flower naturally in spring. Supplemental light is not necessary.
  2. For a select group of dianthus varieties that do not require vernalization, such as the Early Bird and Scent First series, there is an opportunity to finish these inside a greenhouse for spring flowering sales. Transplant liners in late fall or winter and bulk at 60°-65ºF night and day temperatures. Then, move bulked plants to a greenhouse with night-interruption lighting from 10:00 p.m. to 2:00 a.m. and force at 55ºF night and 65ºF day temperatures. Flowering response is about 9 to 11 weeks depending upon variety.
  3. Because many of the newer genetics do not require vernalization, another option is to transplant liners into quarts or gallons in spring. Finish outdoors under naturally occurring daylength and temperature and sell in early summer. This is not recommended for Dianthus gratianopolitanus cultivars–these should be produced using option No. 1 only.

These tips were provided by Melanie Neff, technical support specialist for Green Leaf Plants®. Using data collected in the trial garden in Lancaster, Pa., she and the product support team develop authoritative technical guides for many plants. These are available online at GLplants.com/technical-guides.html.

Leave a Reply

More From Perennials...

October 4, 2015

ePlantSource Adds 5 New Partner Companies

ePlantSource has announced an additional five companies that have been added to its partner distribution list. Not only do the additional partners offer more supplier options to ePlantSource customers, but the website now also provides a more diverse product list with the addition of bulbs, clematis and many new varieties. New partners added for the 2015 – 2016 season: A.D.R. Bulbs Lennon Farm Greenhouses Micandy Gardens Pacific Growers Roseville Farms “We make it a priority to respond to our customers, and we have had many requests for additional options and a more diverse product line, so we are continually evaluating suppliers that work well with our non-traditional approach to the sale of live goods,” says Gary Falkenstein, President and CEO of ePlantSource. “We feel that it is good for our company, our customers and the industry as a whole to keep looking forward and seeing how we can improve and expand how […]

Read More
Joey Wiseman-2015

October 3, 2015

4 New Hires And Promotions In Horticulture

Management restructuring and growth expansion have prompted several companies in the horticulture industry to bring on more help and promote qualified employees to new positions over the few several months. Here are four that have occurred during the months of July 2015 through September 2015.

Read More
BallSeed New Website September 2015

October 3, 2015

BallSeed.com Goes Mobile-Friendly

BallSeed.com is now mobile-optimized. A new update features responsive design, quick access to WebTrack, an enhanced product search and more. Mobile-Friendly content and clear navigation make information more accessible to customers on-the-move and in the greenhouse.

Read More
Latest Stories
Feature image The 2015 Perennial Plant Of The Year, Geranium x cantabrigiense ‘Biokovo.’

September 1, 2015

Perennial Plant Association’s 33rd Annual Symposi…

The Perennial Plant Association's 33rd Annual Symposium, held July 27 to August 1 in Baltimore, Md., delved into the rich history of perennial suppliers and landscape architects in the Baltimore area and their influence on the perennial market today and its bright future.

Read More
Kaleidoscope Abelia (Plant Haven International)

June 17, 2015

PlantHaven International Launches National Campaign To …

PlantHaven International has partnered with BlueSkye Creative to initiate a national consumer ad campaign that carries across radio, video, print and social media to increase sales of Abelia Kaleidoscope.

Read More

May 1, 2015

18 New Grasses To Grow

Ornamental grasses fit in with the needs of today’s landscapers and consumers better than ever. Whether your customers are looking for creative solutions for patio containers or a mass planting in a landscape, some of the 18 new varieties included here are sure to meet the need.

Read More

April 15, 2015

All-America Selections Launches New Perennial Trial

All-America Selections (AAS) in partnership with Perennial Plant Association (PPA) will launch an herbaceous perennial trial, with entries due this July. It will follow many of the basics of the recently launched AAS Vegetative Ornamental trial. Entries accepted will be herbaceous perennials propagated from seed, cutting, tissue culture or bare root.

Read More
Lurie Garden Millennium Park

April 14, 2015

Eco-Conscious Landscapes Fast Track The Rise Of Grasses…

The re-focused emphasis on green infrastructure projects, naturalistic design and sustainable landscaping opens the way for growers to source more native plants and grasses.

Read More

April 13, 2015

Look At What’s New At Terra Nova Nurseries

Terra Nova Nurseries, a world leader in plant breeding and genetics, during the last 10 months collaborated with select editors of Martha Stewart Living magazine to plan a feature story and photo spread about heucheras and heucherellas. And see the eight new varieties that are now available to growers as pre-ordered liners.

Read More
Hydrangea 'Endless Summer BloomStruck' from Bailey Nurseries

March 17, 2015

Michael Dirr Slated To Address Attendees At Hydrangeas …

Dr. Michael Dirr to deliver the keynote address at Hydrangeas 2015 conference, hosted by the Cape Cod Hydrangea Society in partnership with Endless Summer Hydrangeas. The conference will take place at the historic Heritage Museums and Gardens in Sandwich, Mass.

Read More

March 10, 2015

How To Determine When To Buy Herbaceous Perennials In V…

Exposing herbaceous perennials to cold temperatures, also known as vernalization, can yield a range of effects, especially on flowering. Beth Engle of SHS Griffin covers whether vernalized liners or unvernalized plants make the best sense for your sales windows.

Read More

March 4, 2015

32 New Perennials For 2016

Perennials are hot and there are some great new perennial introductions for 2016. We contacted breeders and asked them to share images and information on some of the great new varieties they displayed at 2015 California Spring Trials. Check out the slideshow below to see 32 of the new perennials making their debut to the trade this spring.

Read More
Lavandula 'Meerlo' (Sunset Western Garden Collection)

March 3, 2015

Why You Will Still Grow Today’s Big Perennial 10 Years …

What will be the next big perennial? Breeders say it takes more than a splashy plant to distinguish itself in the market. Therefore, the question is not what will be the next big perennial, but rather what perennial performs well enough in the garden to have staying power in the market for years to come.

Read More
Heuch Pink Fizz_featured

March 2, 2015

Intergeneric Crosses Are A New Perennial Trend

Intergeneric crosses, oddities some botanists say are an impossibility, have made serious inroads in the perennial world.

Read More
Gaillardia x grandiflora 'Arizona Apricot'

February 25, 2015

National Garden Bureau Designates 2015 As Year Of The G…

Gaillardia, also known as the blanket flower, is a member of the sunflower family (Asteraceae) and a long-blooming pollinator plant. It is fitting that the National Garden Bureau has specified 2015 as The Year of the Gaillardia.

Read More
Athena Brazil Salvia 'Brazilian Purple'

February 18, 2015

ForemostCo And Athena Brazil Unite To Supply Unrooted P…

ForemostCo, Inc. and Athena Brazil have forged a working relationship to support each other in the unrooted perennial cuttings market for North America. The partnership, geared toward accommodating increasing demand for unrooted perennial cuttings in North America, adds diversity to a recently consolidated market.

Read More
Geranium x cantabrigiense 'Biokovo'

February 17, 2015

Geranium Hybrid ‘Biokovo’ Dubbed 2015 Peren…

Geranium xcantabrigiense ‘Biokovo,' a naturally occurring hybrid of G. dalmaticum and G. macrorrhizum, is the Perennial Plant Association's top pick for 2015 Perennial of the Year. Learn why this tough, landscape geranium took home the prize.

Read More
Lychnis 'Petitie Jenny'

February 2, 2015

Variety Showcase: A Dainty Debutante

Lychnis flos-cuculi ‘Petite Jenny’ is a dwarf form of the popular Blooms of Bressingham® variety Lychnis ‘Jenny.’ This double-flowered little beauty was discovered by Paul Gooderham at Bressingham in a patch of its parent, ‘Jenny.’ ‘Petite Jenny’ produces masses of large, fluffy, double flowers like ‘Jenny,’ but with a more diminutive habit. The species goes by the common name “ragged robin,” but there’s nothing unkempt about ‘Petite Jenny’. An easy-to-grow, tidy little plant, it is suitable for any sunny or lightly shaded border and is also a good container candidate. Garden Performance Mass of bright pink double blooms beginning in mid-May. Sterile blooms provide a longer flowering period Erect, leafy flowering stems Forms compact, bushy clumps just 14” tall with an 18” spread Attracts bees, butterflies, hummingbirds and is deer-resistant Ideal for containers, front of borders, informal cottage gardens and as cut flowers’ Sun or part shade USDA Hardiness Zones 5 to […]

Read More

July 29, 2014

PlantHaven Introduces New Whetman Dianthus Varieties Fo…

PlantHaven introduces three new Whetman dianthus varieties for 2015.

Read More

June 26, 2012

Fruit Punch Dianthus Kicks Up Proven Winners’ Pro…

Proven Winners has announced the release of the Fruit Punch series of hardy dianthus in USDA Zones 4 to 9. This crop is easy to produce and provides color on retail shelves from late spring into summer, often reblooming in fall for the home gardener. Members of this series are all fully double and fragrant, blooming in rich shades of deep red, pink and bicolor flowers. Dianthus ‘Apple Slice’ and Dianthus ‘Coconut Punch’ produce bicolor flowers with deep red edges and pink or white petals. Both of these cultivars are about 10-to-12 inches tall and offer longer flower stems, which are great for cut flowers. Dianthus ‘Black Cherry Wild’ and Dianthus ‘Pomegranate Kiss’ are shorter, more compact cultivars that stand just 6 inches tall in full bloom. D. ‘Black Cherry Wild’ produces deep-velvety-red flowers with a very thin white edge. D. ‘Pomegranate Kiss’ offers unique almost tie-dyed looking flowers in […]

Read More

February 24, 2012

PlantHaven Introduces New Scent First Pot Selection Fro…

Dianthus ‘Coral Reef’ is a new Scent First pot selection from Whetman Pinks. ‘Coral Reef’ boasts a mass of spicy, deep-coral flowers with white picotee on short, sturdy stems. Like all varieties in The Scent First series, this variety joins a family of fragrant, bushy and perpetually-flowering plants. The glaucous foliage forms a compact habit with a height and spread of 8 to 10 inches. No vernalization is required for blooming. Dead head and feed ‘Coral Reef’ regularly to encourage fast repeat blooming from May through September. This dianthus is ideally suited for containers, borders, mass landscape planting or cut flowers. For more information about Dianthus Coral Reef, visit PlantHaven.com or email new.plants@planthaven.com.

Read More